<html>
    <head>
        <title>flask网站</title>
        <!-- Bootstrap core CSS -->
        <link href="{{ url_for('static', filename="bootstrap-3.3.7-dist/css/bootstrap.min.css") }}" rel="stylesheet">
        <script src="../static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
        <style>
         .content span{
           background-color: darkgrey;
           color: aliceblue;
           margin: 0 10px;
           padding: 5px 10px;
         }
       </style>
    </head>
<body>
    <div> 
        {% block header %}
        {% endblock %}
    </div>
    <div>{% block content %}{% endblock %}</div>
    <div id="footer">
        {% block footer %}
        &copy; Copyright 2018 by <a href="http://www.shiyanlou.com/">shiyalou</a>.
        {% endblock %}
    </div>
</body>

</html>